Click on image to view larger version.

Figure 4 Electron-beam angiogram of a person eight years' postcoronary bypass surgery. The left internal mammary graft is widely patent, inserting into the left anterior descending artery (black triangles). The distal artery is well seen and patent, with minimal distal disease. There are two closed saphenous vein grafts (black arrowheads), in addition to two patent saphenous vein grafts, one to a diagonal and one to an obtuse marginal. The right coronary artery has a 100% midvessel stenosis (black arrows).